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2009中国控制与决策会议

作者： Hua Gong~(1,2),Lixin Tang~2 1.College of Science,Shenyang Ligong University,Shenyang 110168,China 2.Liaoning Key Laboratory of Manufacturing System and Logistics,The Logistics Institute,Northeastern University,Shenyang 110004,China

＜正＞In this paper,we study a scheduling model of production and transportation on a single batching *** this model,there are several vehicles with unit capacity that travel between the machine and a holding *** batching machine can process several jobs as a batch in which the processing time of one batch is the largest processing time among all jobs in the *** batching machine needs a setup cost when it processes a new *** objective is to minimize the sum of the total completion time and total setup *** prove that the problem is strongly *** integrated heuristic is developed for the general *** study the value of production-transportation integration by comparing our integrated approach with two sequential approaches where scheduling decisions for job production are made first,followed by job transportation *** experiments show that a significant benefit can be achieved by integration in many cases.

关键词： Production Scheduling Transportation batching Logistics

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Effects of Incorporating Expanded Polystyrene in Concrete Construction

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Journal of Building Construction and Planning Research 2022年第3期10卷 79-101页

作者： Stanley Emmanuel Ubi D. E. Ewa Agbor Reagan Bessong Efiok D. Nyah Deparment of Civil Engineering Cross River University of Technology Calabar Nigeria Department of Genetics and Biotechnology Faculty of Biological Sciences University of Calabar Calabar Nigeria

Polystyrene is a highly popular plastic packaging material. It is essentially non-biodegradable and takes hundreds of years to decompose in case of land filling while other disposal methods or treatments methods create hazardous effects on the environment. However, this material is known to possess properties such as sound insulation, high thermal conductivity, and lightweight, thereby making it a great additive in concrete. Haven incorporated this material into a concrete matrix;in various percentages which served as partial replacement for coarse aggregates, the concretes’ properties were tested and compared with the properties of the conventional concrete. The experimental data was obtained based on the replacement coarse aggregate by EPS volume ratio of 0%, 4%, 8%, 12% and 16%. The concretes’ properties such as its slump, density, compressive strength, flexural strength and split tensile strength were experimentally determined. These results were then used to determine the influence of polystyrene as partial replacement for coarse aggregate was analyzed and the results compared with that of a concrete mix containing no polystyrene. The results obtained from this analysis indicate that the addition of polystyrene in a concrete mix implies smaller densities as the densities of concrete containing 0%, 4%, 8%, 12% and 16% are 2536, 2443, 2363, 2339 and 2316 Kg/m3 respectively. It was also observed that the compressive strength of the concrete decreased with an increase in the percentage of polystyrene incorporated. This is clearly shown using in the 28th day strength of the concrete samples (21.68, 17.25, 15.87, 14.53 and 13.92 mpa for replacements at 0%, 4%, 8%, 12% and 16% respectively). Similarly, the flexural strength of the concrete decreased with an increase in the percentage of polystyrene incorporated. Whereas, the variations in the split tensile strengths were inconsistent as they were notable increments and decrease in the 28th day st

关键词： batching Curing Slump Test Flexural Strength Split Tensile Modulus of Elasticity and Density

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Research on the problem of scheduling multi-product batches in the process industry

Research on the problem of scheduling multi-product batches ...

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第26届中国控制与决策会议

作者： TANG Qi ZHANG Qing-shan The shool of Management Shenyang University of Technology

ISBN: (纸本)9781479937066

With the diversification and personality of customer demand the modern chemical Polyester production has shifted to multi-product small batch *** problem of the scheduling on multi-product small batch production is a new unresolved issue which is that people have been concerned *** paper firstly analyzes the nature of the polyester engineering process and the optimal characteristics of the *** on the supply of materials and inventory constraints,the precedence relationships of the batches between the various stages are *** paper applies continuous-time modeling strategy to establish mixed integer programming model of the integrated problem of batching and *** model consider the integration of batching and scheduling in decision-making and consider multi-product,conversion rate,set-up time and inventory constraints,and then give out an improved particle swarm optimization *** algorithm use two-dimensional coding on behalf of batch quantity to enhance the ability to resolve constrains,and brings out rep airing strategy,drifting strategy and scheduling strategy to decode aparticle into a feasible solution of the *** introduction of the systolic and divergence operators can maintain particle diversity and *** examples ftom enterprises verify that the model and the algorithm have good *** paper extends the batching and scheduling theory of the small batch production in the process industry,and provides methodological support and theoretical basis for the practices of the chemical polyester production.

关键词： Particle Swarm Optimization batching scheduling process industries

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